DAI-ICHI MERGER - Narrative (Details) - USD ($)		11 Months Ended
	Feb. 01, 2015	Dec. 31, 2015	Dec. 31, 2016
Business Acquisition [Line Items]
Per share merger consideration (in dollars per share)	$ 70.00
Dai-ichi Life | Protective Life Corporation
Business Acquisition [Line Items]
Per share merger consideration (in dollars per share)	$ 70
Aggregate cash consideration	$ 5,600,000,000
Goodwill	735,712,000
Decrease in goodwill		$ 3,300,000
Successor
Business Acquisition [Line Items]
Goodwill	$ 735,700,000	732,443,000	$ 793,470,000
Successor | Dai-ichi Life | Protective Life Corporation
Business Acquisition [Line Items]
Goodwill		$ 732,400,000	732,400,000
Tax deductible goodwill			$ 0